package com.hmdp.service.impl;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.hmdp.entity.Shop;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public List<ShopType> queryList() {
        String key = "cache:shop-type:list";
        String cacheJson = stringRedisTemplate.opsForValue().get(key);
        if (StrUtil.isNotBlank(cacheJson)) {
            List<ShopType> shopTypes = JSONUtil.toList(JSONUtil.parseArray(cacheJson), ShopType.class);
            return shopTypes;
        }

        List<ShopType> shopTypes = query().orderByAsc("sort").list();
        if (shopTypes != null && !shopTypes.isEmpty()) {
            // 缓存数据
            String jsonStr = JSONUtil.toJsonStr(shopTypes);
            stringRedisTemplate.opsForValue().set(key, jsonStr);
        }
        return shopTypes;
    }
}
